531244452420 has 768 divisors, whose sum is σ = 1902133739520. Its totient is φ = 122943744000.

The previous prime is 531244452379. The next prime is 531244452433. The reversal of 531244452420 is 24254442135.

531244452420 is a `hidden beast` number, since 5 + 3 + 124 + 4 + 4 + 524 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 2517746115 + ... + 2517746325.

It is an arithmetic number, because the mean of its divisors is an integer number (2476736640).

Almost surely, 2^531244452420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531244452420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (951066869760).

531244452420 is an abundant number, since it is smaller than the sum of its proper divisors (1370889287100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531244452420 is a wasteful number, since it uses less digits than its factorization.

531244452420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 36.

Adding to 531244452420 its reverse (24254442135), we get a palindrome (555498894555).

The spelling of 531244452420 in words is "five hundred thirty-one billion, two hundred forty-four million, four hundred fifty-two thousand, four hundred twenty".